diff options
Diffstat (limited to 'socket.c')
| -rw-r--r-- | socket.c | 70 |
1 files changed, 70 insertions, 0 deletions
@@ -342,6 +342,24 @@ ip_addr_dotted_quad_safe (const char *dotted_quad) } } +bool +ipv6_addr_safe (const char *ipv6_text_addr) +{ + /* verify non-NULL */ + if (!ipv6_text_addr) + return false; + + /* verify length is within limits */ + if (strlen (ipv6_text_addr) > INET6_ADDRSTRLEN ) + return false; + + /* verify that string will convert to IPv6 address */ + { + struct in6_addr a6; + return inet_pton( AF_INET6, ipv6_text_addr, &a6 ) == 1; + } +} + static bool dns_addr_safe (const char *addr) { @@ -2032,6 +2050,58 @@ print_in_addr_t (in_addr_t addr, unsigned int flags, struct gc_arena *gc) return BSTR (&out); } +/* + * Convert an in6_addr in host byte order + * to an ascii representation of an IPv6 address + * (we reuse the L_INET_NTOA mutex, no contention here) + */ +const char * +print_in6_addr (struct in6_addr a6, unsigned int flags, struct gc_arena *gc) +{ + struct buffer out = alloc_buf_gc (64, gc); + char tmp_out_buf[64]; /* inet_ntop wants pointer to buffer */ + + if ( memcmp(&a6, &in6addr_any, sizeof(a6)) != 0 || + !(flags & IA_EMPTY_IF_UNDEF)) + { + mutex_lock_static (L_INET_NTOA); + inet_ntop (AF_INET6, &a6, tmp_out_buf, sizeof(tmp_out_buf)-1); + buf_printf (&out, "%s", tmp_out_buf ); + mutex_unlock_static (L_INET_NTOA); + } + return BSTR (&out); +} + +/* add some offset to an ipv6 address + * (add in steps of 32 bits, taking overflow into next round) + */ +#ifndef s6_addr32 +# ifdef TARGET_SOLARIS +# define s6_addr32 _S6_un._S6_u32 +# else +# define s6_addr32 __u6_addr.__u6_addr32 +# endif +#endif +#ifndef UINT32_MAX +# define UINT32_MAX (4294967295U) +#endif +struct in6_addr add_in6_addr( struct in6_addr base, uint32_t add ) +{ + int i; + uint32_t h; + + for( i=3; i>=0 && add > 0 ; i-- ) + { + h = ntohl( base.s6_addr32[i] ); + base.s6_addr32[i] = htonl( (h+add) & UINT32_MAX ); + /* 32-bit overrun? + * caveat: can't do "h+add > UINT32_MAX" with 32bit math! + */ + add = ( h > UINT32_MAX - add )? 1: 0; + } + return base; +} + /* set environmental variables for ip/port in *addr */ void setenv_sockaddr (struct env_set *es, const char *name_prefix, const struct openvpn_sockaddr *addr, const bool flags) |